Black Beauty. Anna Sewell. Darkie/Black Beauty/Black Auster /Jack/Blackie/Old Crony.
The narrator of the story, a beautiful black horse. He begins his career as a carriage horse for wealthy people but when he "breaks his knees" (develops scars on his knees after a bad fall) he is no longer considered presentable enough and is put to much harder work. He passes through the hands of a bunch of owners, some cruel, some kind. He always tries his best to serve humans despite the circumstance.
A companion of Beauty's at Birtwick Park, she is named for her chestnut color and her habit of biting, which is often how the spice, ginger, is described. Ginger is a more aggressive horse due to her history of bad owners. Beauty and Ginger meet for the last time as broken-down cab horses in London, and later a cart with a dead horse (who Beauty believes is Ginger), passes by Beauty.